This Standard specifies the term and definition, structure style, product model, materials, requirements, test methods, inspection rules, marks, product specification, product packaging, storage and transportation of compound quick air inbreathe-release valve for water supply pipeline (hereinafter referred to as air inbreathe-release valve). This Standard applies to the air inbreathe-release valve of nominal size of DN15~DN300, nominal pressure of not more than PN25, and water temperature of 0C~40C for water supply pipeline.And change the normative references in Chapter 2; a Add the terms and
definitions of floating body, floating body module ... aquot;air pressure when closing of
air inbreathe-release valveaquot;; a Delete the section materials in the Chapter aquot;
Requirementsa. ... the requirements - installing a protective cover outside the air
intake and exhaust passage in-between the valve body and ... Remove the
structure diagram out from the main body, and incorporate it into Appendix A; a
Add the Figure A.1c)anbsp;...